/*
 * Copyright 2023 AntGroup CO., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

package com.antgroup.geaflow.service.discovery;

public interface ServiceConsumer {

    /**
     * Check if the specified path exists.
     */
    boolean exists(String path);

    /**
     * Get the data at the specified path and set a watch.
     */
    byte[] getDataAndWatch(String path);

    /**
     * Register the specified listener to receive updated events.
     */
    default void register(ServiceListener listener){}

    /**
     * close the consumer.
     */
    void close();
}
